Pocketbook Appendix Lite vs Guitar Chord Composer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pocketbook Appendix Lite
This app provides a comprehensive collection of Japanese reference data, including postal charges, holidays, age tables, and conversion charts. It is regularly updated with new information and bug fixes to ensure accuracy and usability.
- Age table
- Conversion table
- Postal charges
- Emergency numbers
- Japanese holidays
- Calendar
- Solar system information
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Pocketbook Appendix Lite is english version of Techo-no-furoku(手帳の付録) Lite. This application is like the Japanese pocketbook appendix. It has a lot of information on Japan and more than Pocketbook Appendix. [ver1.3.8 Update] - Update "Postal Charges" data after 2025/11/1 - Update "Noshigami" - Update "Long-lived celebration" - Update "Emergency number" [ver1.3.7 Update] "Postal Charges" data after 2024/10/1 [ver1.3.6 Update] "Postal Charges" data after 2023/10/1 [ver1.3.5 Update] "Postal Charges" data after 2023/05/8 [ver1.3.3 Update] - Update "Postal Charges" data after 2019/10/1 [ver1.3.2 Update] - Update "Age table" for new Japanese Calender - Update "Japanese holiday" for 2019,2020 [ver1.3.1 Update] - Fix unit of acceleration in conversion table on Japanese version. [ver1.3.0 Update] - Add Mountain Day to Japanese Holiday. - Fix that not all of A.D. of the age table is displayed. - Fix calculation flow rate, kinematic viscosity ,absolute measurement in conversion table. - Update postal charges. - Fix that crash when selecting some items. - Fix that layout collapses when displayed on landscape screen. - Fix the app name to Pocketbook Appendix Lite. [ver1.2.0 Update] - Acceleration, flow rate, additional viscosity, kinematic viscosity to absolute measurement conversion table - If you have to bold in body configuration, Fixed a phenomenon that sum calendar display of age Chart is interrupted [Ver1.1.0 Update] - bug fixes to be killed iOS8 [Ver1.0.9 Update] Fixed a memory leak [Ver1.0.8 Update] - URL Scheme 'appendixf' - Background Color Bug Fix URLスキーム対応 "appendixf" [Ver1.0.7 Update] - iOS7 PickerView Bug Fix [Ver1.0.5 Update] - Tax Rate Change [Ver1.0.4 Update] - Bug fix in Emergency number [Ver1.0.3 Update] - Menu icon add - Bug fix [Ver1.0.2 Update] - Add to a dwarf planet in the solar system star - Bug Fix [Contents] - Age table - Conversion table - Postal charges - Emergency number - Japanese holiday - Rokuyō - Prefectures of Japan - Country number - Time difference - Writing of letter - Noshigami - Calendar (Koyomi) - Solar system - The twelve signs of the zodiac - Language of flowers - Long-lived celebration - Wedding Anniversary "Pocketbook Appendix" (paid version) contents - The symbol of an element - Size table - Web color code - Yakudoshi - Stamp duty - The 24 Solar Terms - Paper size The paid version will not see advertising.
Guitar Chord Composer
Instantly find, hear, and build over 370 guitar chords with multiple voicings. Explore classic progressions, compose your own songs, and utilize practice tools like a metronome and capo calculator. Includes a beginner's guide and left-handed mode.
- 370+ instant guitar chords
- Tap to hear chord voicings
- Auto-play chord progressions
- Compose and save song progressions
- Capo calculator
- Metronome and strum patterns
- Beginner's guide and practice log
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Guitar Chord Book brings together everything you need to find, hear, and build guitar chords in one app. [Find 370+ chords instantly] 12 roots x 31 types fully covered — major, minor, 7th, M7, m7, 6, sus4, add9, dim, aug, and tensions like 7(9), 7(b9), 7(#9), 7(13), M7(13), m7(11) and more. Just pick a root and a type to see the fingering at once. Each chord includes multiple voicings, so you can explore other shapes up the neck. [Tap to hear it] Built-in realistic guitar samples play every time you select a chord, so you learn by ear. Compare how each voicing sounds. [Auto-play progressions] A rich library of classics — Royal Road, Canon, ii-V-I, 12-bar blues and more. Play any progression back at your own tempo with the current chord highlighted. [Compose your own songs] Line up chords, set tempo, time signature, sections and repeats, then save your own progression. Preview as you go, or start from a built-in progression and edit it. [Handy practice tools] - Capo calculator: transpose keys and find the capo position - Metronome: 40-240 BPM, multiple time signatures - Strum patterns: 8-beat, 16-beat, bossa nova, reggae, funk and more - Practice log: track daily practice time and streaks on a calendar [Beginner guide] The first 8 chords to learn, plus practice tips. [More] - Favorites for chords and progressions - Left-handed mode (mirrored diagrams) - 9 languages supported From beginner practice to advanced voicing hunts to songwriting — one book that does it all.
Screenshots
Verdict
The clearest difference is in-app purchases: Pocketbook Appendix Lite at none against Guitar Chord Composer's 1. Pocketbook Appendix Lite also leads on iOS requirement (11.0 vs 17.0). Guitar Chord Composer's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 6 months). On price and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Guitar Chord Composer sells 1 one-off in-app purchase. Pocketbook Appendix Lite asks for nothing beyond the download.
Pocketbook Appendix Lite ships an update every 6 months, Guitar Chord Composer every 3 weeks. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.
| Parameter | Pocketbook Appendix Lite | Guitar Chord Composer |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 45.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 6 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 11.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 7 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | TECHNO SQUARE Inc. | SANWA Inc. |
Customer experience
Pocketbook Appendix Lite
Guitar Chord Composer
In-app purchases
Pocketbook Appendix Lite
No in-app purchases
Guitar Chord Composer
- 作曲サポート Pro$5.99





